Add education sitemap
education sitemap was not included in the sitemaps (the coverage of that file was 0%).
Also adding merchandise items fixture to the sitemap because that should help test if it generates things correctly.
Previous behaviour
Steps to reproduce:
- curl https://thalia.nu/sitemap.xml | grep education
New behaviour
Steps to validate that it works:
- curl https://thalia.nu/sitemap.xml | grep education
Edited by Thom Wiggers